Update actions/checkout action to v6 (#2340)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/changesets.yml

@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout Repo
-        uses: actions/checkout@v3
+        uses: actions/checkout@v6
         with:
           # Fetch all git history for correct changelog commits
           fetch-depth: 0

.github/workflows/ci.yml

@@ -14,7 +14,7 @@ jobs:
   lint:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v6
       - name: Use Node.js 16
         uses: actions/setup-node@v6
         with:
@@ -39,7 +39,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v6
       - name: Use Node.js 16
         uses: actions/setup-node@v6
         with:
@@ -60,7 +60,7 @@ jobs:
   build-storybook:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v6
       - name: Use Node.js 16
         uses: actions/setup-node@v6
         with:
@@ -87,7 +87,7 @@ jobs:
     runs-on: ubuntu-22.04
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v6
       - name: Use Node.js 16
         uses: actions/setup-node@v6
         with: